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A comment on Introducing extended line endings support in Notepad. Parent comment

Re:Introducing extended line endings support in Notepad by mark-r on Tuesday May 08, 2018 @05:49PM (#17025524)
I remember a system that overprinted about 5 characters to black out a password after you entered it. Good times.

The NUL character was useful for inserting a delay into the serial stream.

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Re:Introducing extended line endings support in Notepad by jacquesm on Tuesday May 08, 2018 @05:54PM (#17025567)
Hehe, security by obscure it y.

And in sync links (not TTY's those were mostly async with start and stop bits, more like HDLC style stuff) those nuls were mandatory, you had to send something.

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